Clamping device



June 24, 193e. J. B CRAP@ 1,766,488

CLAMPING DEVICE Filed March 8. 1928 www Patented June 24, 1930 UNHTEDSTATES PATENT OFFICE CLAIVIPING DEVICE Application iiled March 8,

The principal object of my invention is to provide an etlieient7 compactand easily operated device for clamping ropes or other elements andwhile my device is particularly useful in connection with boats andcanoes it is very useful for other purposes.

A feature of my invention is the cooperation of a lined member and amovable mem ber to form a bite upon the rope or other member.

Another feature is a coiled spring arranged to exert strong pressuretending to hold the movable member in clamping position.

Another feature consists in simple and compact mechanism to move themovable member out of clamping position.

Other features ot the invention will be pointed out below.

in the drawing Figure l is a plan of a clamp embodying my invention;

Figure 2 is an elevation of the same showing alsoa portion of a boat;

Figure 3 is a central vertical section of the device as shown in Figure2; and

Figure i is a plan similar to Figure l, but partly broken away to showinterior construction.

show a suitable part l of a boat, to which part the fixed member 2 isfastened by screws 3 and 4:. Member 2 has a suitable interiorly threadedperforation to receive a pivot pin described below. Member 2 is formedwith a groove 5 which is curved vertically and horizontally as shown.This groove receives a portion of the rope G or other element and has awall 7 at the end of the groove, which wall acts with the movable memberdescribed below to give a bite on the rope. The wall 7 is formed with ahook 8 to aid in holding the rope in the groove. The member 2 has aportion 9 sloping downwardly and outwardly instead of a sharp'edge asthe latter' might wear 1328. Serial No. 259,941.

away the rope. This sloping edge also prevents the rope from drawingagainst the wood l of the boat and consequently prevents detacement ofthe wood which is a matter of consequence, as in the ease of linelyfinished motor boats.

The threading of bolt lO engages the threading in member 2 and the shankof 'the bolt is surrounded by bushing ll which tits suitably within anopening in member l2, so that the latter is pivot-ed to iixed member 2.Member l2 is suitably recessed at the bottom to permit a strong coiledspring 13 to be coiled about bushing ll, one leg lei of the springengaging pin l5 iixed to the member 2 and the other leg 16 ol the springengaging wall i7 of the recess in member l2, said spring tending to holdthe pivoted member l2 in the clamping position of Figure l andconsequently tending to aid in prevention of movement of the rope towardthe anchor or other fixed end of the rope or away from such anchor. Themember l2 is made with a perforation 18 to give access to screw 3 forassembly or disassembly. The member l2 is provided with teeth to engagethe rope, tooth 19 cooperating with wall 7 to give a irm bite on therope.

A cam 2O is provided within the recess in member l2 and has .fixedconnection with a shank 2l which has a circulaiportion passing through aperforation in member if? located between the pivot et member l2 and thefree end ot' member l2, the upper portier oi the shank beingrectangularl in cross section. Upon this rectangular portion is mounteda lever or handle which has an interior opening to lit the rectangularportion of the shank to provide for turning of the shank andconsequently turning of the cam. A pin 23, passing through the handleand engaging the shank, is provided to prevent vertical movement ot thehandle. The periphery et the cam engages pin 2drwhich is lined to themember 2 so that when the handle 22 is moved upwardly in Figure l memberYl2 will be moved. away trom clamping position and this movement may becontinued until notch 25" in the periphery of the cam engages pin "istand then the cam will be held in that position which is the inoperativeor unclamped position of member 12. The user of the device ma)v then useboth hands tor manipulation ot the rope.

'hat 1 claim is:

Al. A device ot the character described comprising a iixed member and apivoted member, one of said members having ay groove tor a rope or thelike and a wall at the end of the groove and the other ot said membershaving a project-ion, said wall and said projection forming a bite uponthe rope or the like when the pivoted member is in clamping position;and means to hold the pivoted member in clamping position.

2. A device of the character described comprising a fixed member; apivoted member having a recess; and a coiled spring having two legswithin said recess, one leg engaging the iixed member and the other legengaging the pivoted member to hold the latter in clamping position.

3. A device ot' the character described comprising a fixed member, apivoted member; resilient means tending to hold said pivoted member inclamping position; and a cam mounted on the pivoted member and havingits periphery in ope 'ative engagement with the fixed member to move thepivoted member out ot clamping position.

4J. device ot' the character described eoniprising a fixed member; apivoted member: resilient means temiling to hold said pivoted member inclamping position; and a cam mounted on the pivoted member and havingits periphery in operative engagement. with the fixed member to move thepivoted member out ot clamping position; and means to hold the camagainst movemeut when the pivoted member is in the desired inoperativeposition.

5. A device ot the character described comprising a. fixed 'member'. a.pivoted member: resilient means tending to hold said pivoted member inclampiiig position: a cam pivoted on said pivoted member between thepivot and tree end ot the pivoted member, said cam having its peripheryin operative engagement with the fixed member and being' located beneaththe pivotcd member; and a lever above the pivoted member and havingfixed connection with the cam to operate the latter.

6. A device ot the character described comprising a fixed member havinga portion sloping downwardliv and outwardly; a pivoted member tocooperate with the fixed member; and means to hold the pivoted member inclamping position, said sloping portion heilig located adjacent to theedge of the tixed member.

7. A device ot the character described comprising a tixed member; ayscrew to hold said tiXed member to a support; a pivoted member movableacross the head ot' said screw and having au opening to give, access tosaid screw head when the pivoted member is in its non-clamping position;and means to hold the pivoted member in clamping position with relationto the fixed member.

JOHN B. CRAPO.

